LANSING, Mich. (AP) — Michigan’s ragged roads could stay smoother for longer under changes to transportation funding proposed by House leaders Thursday.

Republican House Speaker Jase Bolger announced a roads funding plan of at least $450 million in fiscal 2015 and at least $500 million annually by fiscal 2018. The legislation would require warranties on road work to avoid short-term fixes and would change various streams of tax revenue.